Loud speaker



FIG. 1 is a front elevation of a loudspeaker showing my new design;

FIG. 2 is a left-side view of the loudspeaker in FIG. 1;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top-plan elevation view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a loudspeaker, substantially as shown. 